Sound volume correcting device, sound volume correcting method, sound volume correcting program, and electronic apparatus

1. A sound volume correcting device comprising: a variable gain device configured to control a gain of an input audio signal based at least in part on a gain control signal; a voice average level detecting device configured to detect an average level of a human voice signal in the input audio signal, wherein the voice average level detecting device includes: a voice interval detecting device configured to detect a voice interval which is a time interval including the human voice signal in the input audio signal, wherein the voice interval detecting device includes: a peak period detecting device configured to detect an inter-peak period of the input audio signal; a continuous identical period detecting device configured to detect a continuous identical period by detecting the identity of the adjacent inter-peak periods using the inter-peak period detected by the peak period detecting device; and a frequency detecting device configured to detect as the voice interval an interval including the continuous identical period detected by the continuous identical period detecting device or to detect as the voice interval a time interval in which the frequency of the continuous identical period is equal to or greater than a reference value; and a voice average level generating device configured to detect the average level of the input audio signal in the voice interval detected by the voice interval detecting device and to generate a continuous average level in which the detected average level of the voice interval is continuous; and a gain control signal generating device configured to generate the gain control signal for controlling the gain of the input audio signal using the average level of the human voice signal detected by the voice average level detecting device as a reference level and to supply the generated gain control signal to the variable gain device, wherein the gain control signal generating device generates the gain control signal for controlling the gain of the input audio signal using the continuous average level as the reference level.

2. A sound volume correcting device comprising: a variable gain device configured to control a gain of an input audio signal based at least in part on a gain control signal; a voice average level detecting device configured to detect an average level of a human voice signal in the input audio signal, wherein the voice average level detecting device includes: a voice interval detecting device configured to detect a voice interval which is a time interval including the human voice signal in the input audio signal, wherein the voice interval detecting device includes: a first filter configured to extract a first audio signal including a voice frequency band from the input audio signal; a first average level detecting device configured to detect the average level of the first audio signal from the first filter; a second filter configured to extract a second audio signal not including the voice frequency band from the input audio signal; a second average level detecting device configured to detect the average level of the second audio signal from the second filter; and a comparing device configured to detect as the voice interval a time interval in which the difference or ratio of the average level detected by the first average level detecting device and the average level detected by the second average level detecting device is equal to or greater than a reference value; and a voice average level generating device configured to detect the average level of the input audio signal in the voice interval detected by the voice interval detecting device and to generate a continuous average level in which the detected average level of the voice interval is continuous; and a gain control signal generating device configured to generate the gain control signal for controlling the gain of the input audio signal using the average level of the human voice signal detected by the voice average level detecting device as a reference level and to supply the generated gain control signal to the variable gain device, wherein the gain control signal generating device generates the gain control signal for controlling the gain of the input audio signal using the continuous average level as the reference level.

3. A sound volume correcting device comprising: a variable gain device configured to control a gain of an input audio signal based at least in part on a gain control signal, wherein the input audio signal is two-channel audio signals; a voice average level detecting device configured to detect an average level of a human voice signal in the input audio signal, wherein the voice average level detecting device includes: a voice interval detecting device configured to detect a voice interval which is a time interval including the human voice signal in the input audio signal, wherein the voice interval detecting device includes a center orientation detecting device configured to detect as the voice interval a time interval in which a center orientation distribution from the two-channel audio signals is equal to or greater than a reference value; and a voice average level generating device configured to detect the average level of the input audio signal in the voice interval detected by the voice interval detecting device and to generate a continuous average level in which the detected average level of the voice interval is continuous; and a gain control signal generating device configured to generate the gain control signal for controlling the gain of the input audio signal using the average level of the human voice signal detected by the voice average level detecting device as a reference level and to supply the generated gain control signal to the variable gain device, wherein the gain control signal generating device generates the gain control signal for controlling the gain of the input audio signal using the continuous average level as the reference level.

4. A sound volume correcting device comprising: a variable gain device configured to control a gain of an input audio signal based at least in part on a gain control signal; a voice average level detecting device configured to detect an average level of a human voice signal in the input audio signal, wherein the voice average level detecting device includes: a voice interval detecting device configured to detect a voice interval which is a time interval including the human voice signal in the input audio signal, wherein the voice interval detecting device comprises any one or a combination of two or more of a device selected from the group consisting of: a peak period detecting device configured to detect an inter-peak period of the input audio signal, a continuous identical period detecting device configured to detect a continuous identical period by detecting the identity of the adjacent inter-peak periods using the inter-peak period detected by the peak period detecting device, and a frequency detecting device configured to detect as the voice interval an interval including the continuous identical period detected by the continuous identical period detecting device or to detect as the voice interval a time interval in which the frequency of the continuous identical period is equal to or greater than a reference value; a first filter configured to extract a first audio signal including a voice frequency band from the input audio signal, a first average level detecting device configured to detect the average level of the first audio signal from the first filter, a second filter configured to extract a second audio signal not including the voice frequency band from the input audio signal, a second average level detecting device configured to detect the average level of the second audio signal from the second filter, and a comparing device configured to detect as the voice interval a time interval in which the difference or ratio of the average level detected by the first average level detecting device and the average level detected by the second average level detecting device is equal to or greater than a reference value; and a center orientation detecting device configured to detect as the voice interval a time interval in which a center orientation distribution from the two-channel audio signals is equal to or greater than a reference value when the input audio signal is two-channel audio signals; and a voice average level generating device configured to detect the average level of the input audio signal in the voice interval detected by the voice interval detecting device and to generate a continuous average level in which the detected average level of the voice interval is continuous; and a gain control signal generating device configured to generate the gain control signal for controlling the gain of the input audio signal using the average level of the human voice signal detected by the voice average level detecting device as a reference level and to supply the generated gain control signal to the variable gain device, wherein the gain control signal generating device generates the gain control signal for controlling the gain of the input audio signal using the continuous average level as the reference level.

5. A sound volume correcting device comprising: a variable gain device configured to control a gain of an input audio signal based at least in part on a gain control signal; a voice average level detecting device configured to detect an average level of a human voice signal in the input audio signal; a non-voice average level detecting device configured to detect an average level of a non-voice and non-silence audio signal in the input audio signal; and a gain control signal generating device configured to generate the gain control signal for controlling the gain of the input audio signal using the voice average level detected by the voice average level detecting device as a reference level when the non-voice average level detected by the non-voice average level detecting device is not greater than the voice average level detected by the voice average level detecting device by a predetermined amount, to generate the gain control signal for controlling the gain of the input audio signal using the non-voice average level detected by the non-voice average level detecting device as a reference level when the non-voice average level detected by the non-voice average level detecting device is greater than the voice average level detected by the voice average level detecting device by the predetermined amount, and to supply the generated gain control signal to the variable gain device.

6. A sound volume correcting method of a sound volume correcting device having a variable gain device for controlling a gain of an input audio signal on the basis of a gain control signal, a voice average level detecting device, and a gain control signal generating device, the sound volume correcting method comprising: detecting, using the voice average level device, an average level of a human voice signal in the input audio signal by detecting a voice interval which is a time interval including the human voice signal in the input audio signal, wherein detecting a voice interval comprises: detecting an inter-peak period of the input audio signal; detecting a continuous identical period by detecting the identity of the adjacent inter-peak periods using the inter-peak period detected by the peak period detecting device; and detecting as the voice interval an interval including the continuous identical period detected by the continuous identical period detecting device or detecting as the voice interval a time interval in which the frequency of the continuous identical period is equal to or greater than a reference value; and generating, using the gain control signal generating device, the gain control signal for controlling the gain of the input audio signal using the average level of the detected human voice signal as a reference level, wherein the variable gain device is controlled based at least in part on the generated gain control signal.

7. A sound volume correcting method of a sound volume correcting device having a variable gain device for controlling a gain of an input audio signal on the basis of a gain control signal, a voice average level detecting device, a non-voice average level detecting device, and a gain control signal generating device, the sound volume correcting method comprising: detecting, using the voice average level detecting device, an average level of a human voice signal in the input audio signal; detecting, using the non-voice average level detecting device, an average level of a non-voice and non-silence audio signal in the input audio signal; and generating, using the gain control signal generating device, the gain control signal for controlling the gain of the input audio signal using the detected voice average level as a reference level when the detected non-voice average level is not greater than the detected voice average level by a predetermined amount and to generate the gain control signal for controlling the gain of the input audio signal using the detected non-voice average level as a reference level when the detected non-voice average level is greater than the detected voice average level by the predetermined amount, wherein the variable gain device is controlled based at least in part on the generated gain control signal.

8. An electronic apparatus having a sound volume correcting device comprising: a variable gain device configured to control a gain of an input audio signal based at least in part on a gain control signal; a voice average level detector configured to detect an average level of a human voice signal in the input audio signal; a non-voice average level detector configured to detect an average level of a non-voice and a non-silence audio signal in the input audio signal; and a gain control signal generator configured to generate the gain control signal for controlling the gain of the input audio signal using the voice average level detected by the voice average level detector as a reference level when the non-voice average level detected by the non-voice average level detector is not greater than the voice average level detected by the voice average level detector by a predetermined amount, to generate the gain control signal for controlling the gain of the input audio signal using the non-voice average level detected by the non-voice average level detector as a reference level when the non-voice average level detected by the non-voice average level detector is greater than the voice average level detected by the voice average level detector by the predetermined amount, and to supply the generated gain control signal to the variable gain device.